Blow-out pbeventeb



Nov; 15, 1932.

B; M. JENSEN BLOW -OUT PREVENTER Original Fil ed Oct. 20, 1926 INVENTOR, fierziel'h. finger i TTORNEYWJ Reissued Nov. 15, 1932 5 UNITED STATES or nnna, cnt'nronma Original No. 1,812,297, dated June 80, 1931, Serial No. 142,915, filed October.

. reissue filed .I'ebruary 19, 1932. Serialiio. 594,079}.

This invention relates to safety'apparatus for oil well drilling equipment, andespecially to a'high pressure control gate adaptable towell casing particularly for the purpose of making an effective closure about an inner;

string of elements such, for instance, as a rill pipe extendin down in the casing. V

In the-drilling 0 deep holes, it often happens that rather highpressures of liquid and gas are encountered, and such an event is attended with risk of injury or loss of equipment, property and life and as early as 1902 (Layne Patent. 778.,59l-)]it was proposed to make a valve which included a pair of gate members to close together and to close about a central element. But the Layne valve was provided with rubber packingwhich was only effective around the embraced, inner element' and no packing was provided as between the sliding gate parts and the gate casing and leakage was not precluded therepast.

Therefore, the broad object of this invention is to'provide a safety control device including a packing means eflective to cut off all sources of leak through the valve struc-- ture and thus form a reliable blow-out preventer. In other words, .it is an object to provide a control gate device wherein not only is the through passage closed but also the operative gates are packed in the valve shell to close clearance crevicesthrough the shell. a A further object is to provide a safety control gate device or blow-out preventer in which the packing between the gates and the valve shellls automatically expanded to close oil the clearance crevices as the move to a closin position Anadditiona object is to provide a gate closing mechanism of few, efiecti ve and simple parts capable'of rapid and rel ablefaction. The invention consists in certain advancements inthis art asset forth in the ensuin disclosure and having, with the above, additional vobjects and advantages, and whose COIlStIllCtlOD, combination and details of means, and the manner of operation will be made manifest in thedescription of the herewith illustrative embodiment; it being un;

derstood that modifications, variations" and Brow-our rnnvnnrnn gate members PATENT oerce BERTE'L M. JENSEN, 0F HUNTINGTON BEACH, CALIFORNIA, ASSIGNOB TO w. D. awn-1m, s r

20, 192 0. Application for Y adaptations may be resorted to within the scope, principle and spirit of the invention as it is more directly claimed hereinafter.

Flgure 1 is a plan of'the valve gates in the lower shell half; parts being broken away.

Figure 2 is an axial section of the device 1 as applied to a. well casing and with its gates 1n closed positionembraclng a through pipe.

Flgure 3 is a perspective of one of the rubber gaskets of a gate member.

The valve body matched, meetingor shell consists of" 0 we top and bottom see-- tions 1-1, suitably fastened together, as by a 7 set of bolts 2. These sections have threads .6 I

to receive, aligned casing ends 55 through,

which passes a pipe string 3, which may be a drill stem, with sectionsconnected by collars vor 10111138 4- which present shoulder ends.

ates

venter or control device resides in a packing means which not only effectively closes on the through pipe but also eifectively seals the closedgate parts on their shell to prevent leak through the shell. This packing means includes laterally extending, upper and lower leaves 45 .ofrubber, rubberized fahric,-

leather, or any othersuitable material and ,which respectively surround the through pipe 3 asa collar but also have a very large areaof bearing and sealing contact with the adjacent smooth, interior, top and bottom surfaees46-46 of the valve shell 1-1. 1

The n per leaves 45 are connectedjby a.

split, ra ially finned collar 45 to the lower leaves 45'; the collar 45lying in the recesses of the meeting faces of the gates,13+-14 and '1 the fins 45 being on the diametrical faces of the gates. Thus when the gates are closed the collar seals on the pipe 3, the fins 45" meet diametrically and the leaves pack against the faces 46- 46 so that there is adoublesshell seal all'around the hole through of the leaves. on the faoes' 46- l6 t egates 13-14 each are made with-upper and lower members or shims 17-18 w "ch are overlapped by'the'widepacking leaves of the collar 45. -Theinner faces of the shims '17+18 have bevel faced recesses which are complementary tobevel. or cam faces. 0 on the top and bottom'faces of the-gate-bodies. Thesecamsaredesigned to thrust the shims outwardly as the gates close together and is on the through pipe 3 so that the packing leaves seat firmly on the opposed large, flat area of faces teen around the casin hole through the shell 1v1 both at to an bot- 34' of the shell --1. f

enough to force the strin 3 upward.

tom thereof. This, with the close collar45'. and abutted fins 45 thus making a-perfect and complete shut-off through the shell; an accomplishment not heretofore. available in well casin valves of this type. ltwill pipe 3 can bear against the closed valve ates when these are in closed position, an by reason of engagement with t e packing material Fi 2, will increase the sealing effect osed valve. The closed gates act as a lock engaging the 'ipe collar 4 to hold back the'string in case 0 blow-out .pressureiigh u1table means to concurrent y actuate the gates is provided and as here shown the gate 13 is connected by a pin 30 to a steinj31threaded into a socket 32 which is threaded into .a sleeve 33 axiall sliding in-a lateral chamber I r The sleeve 33has a-set .of s'paced arms 34-35 and these extend to the opposite end of'theshell 1 -1 and are secured to the gate. 14, as by a pin8. The sleeve 33 Has an axial shaft 40 journaled in the shell structure and provided with a peripheral shoulder 37 recessed in the journal so as to reclude end motion of the shaft and its e arged sleeve head 32. The outer end of the shaft is ada ted for application of a suitable device or.

applyinsia turning effort, in either direction, to the aft and therefore" to the sleeve or head 32.

Itis desirable to cause the gates. 13-14 to simultaneously, relativel move in op osite directions when the she 40is turne and forv this purpose the-outside threads 41 and the bore threads 42 of'the sleeve head 32 are of relatively reverse pitch, that is, one is 3 right hand and one is left-hand, though both are of equal -helical pitch. Therefore, as the shaft 40 is turned 1p one direction the two gates 13-44 will concurrently recede fromclosed position, orconversely will'move coev ally in closing action.

great advanta e of this motivating system orvthe gates is't at it is gearless and extremely simple, most noticeably. compact,

observed that the collar of the and and particularly protected since the entire mechanism is housed in the gate shell-11.

Utilit and operation are thought clearly I disclose in the above description.

What is claimed is:

'1. A safet I gate valve, for preventing blow-outs in gh' pressure wells,.includiII1g a the lgate s and seating on adjacent faces in thev she 2. A safety ate valve, for preventing blow-outs in we ls, including a shell with a through .hole, a air of oppositely disposed gates guided in t e shell, and packing means covering the adjacent faces of said gates and' having top and'bottom parts lying between the gates and their shelfl bearin faces and forming complete seals around t e said hole when the ates are closed.

. 3. Asa ety gate valve for controlling flow in well uipment, including a shell with a through ole and having spaced internal bearing faces, opposite gates operative between saidfaces to close off flow, and packing means between said faces and said gatesan forming complete seals,-when closed,'around said hole; said packing covering the adjacelit, closing faces of sand gates. guide faces between which said gate is movable, and packing covering the closing end of I c on sai the and "faces to form a seal thereon.

gate and laterally overlapping the to ottom of the gate and bearing valve having a gate moving sidewise,

5. A valve havlng a pair of opposed gates, I guide faces between which the gates are mounted, and packin covering the closing faces of-the ates an overlapping the top and bottom o each gate and bearing on said guide faces to form'a seal thereon when the gates are closed. 6. A valve having flow hole, v a chamber having plane spaced a shell with a through .faces, and opposite gates with closing faces each covered with a layer of packing which extends over the-faces of the gates which are adjacent to the said plane faces. v

7. A valve having a shell with a through flow hole, a chamber having plane spaced faces, and opposite gates with closing faces each covered with a layer of packing which extends over the faces of the ga s which are adj acent-to the said plane faces; he extended portions of the packing being expansible against the plane faces. 8. A gate valve comprising oppositely disposed gates operative to open or to close said valve, and means for reciprocating said gates; said gates having their closing faces covered with a layer of packing which ex tends over top and bottom faees f the gates faces and forms complete upper and lower packing annulus when the gates are closed.

9. A valve having a shell havinga flow hole which is surrounded by plane faces of the valve chamber,and opposite gates working insaid chamber and having top and bottom faces overlapped by layers of packing lying against said faces and which are operative to form complete packing seals around the hole when the gates are closed.

10. A valve having a shell having a flow hole which/is surrounded "by plane faces of the valve chamber, and opposite gates working in said chamber and having top and bottom faces overlapped by layers of packing lying against said faces and which are cooperative to around the hole when the gates are closed;

form complete packing seals said packing covering respective closin faces of the gates and meeting in sealing re ation.

1-1. A valve having "a shell having a flow hole which is surrounded by plane faces of the. valve chamber, and opposite gates work- "ing in said chamber and having la ers of hole which is surrounded by plane faces of pack-ing lying against said faces an which are 'cooperatlve to form complete packing seals around the hole when the gatesare closed; said packing layers being expanded by closing action of the opposed gates.

12. A valve having a shell having a flow the valve chamber',-,and opposite gates working in said chamber and having layers of packing lying against said faces and which are cooperative to form complete packing seals around the hole when the gates are closed and means for eflectinganexpansion of said packing against the sald faces as the gates are closed.

13. A valve having a shell having a flow hole and a gate chamber, opposedgates in said chamber having packing layers against adjacent faces of the chamber and covering the closing faces of the gates, said gates having means for expanding the layers against the said chamber faces.

14; A valve having a shell having a flow hole and a gate chamber, opposed gates in said chamber having packing layers against adjacent faces of the chamber and covering the closing faces of the gates, said gates having means for expanding the layers against the said chamber faces; and means for concurrently actuating the gates in opposite directions. f

15. A gate valve structure including a shell 1 open.

- surrounding sai interrl l pted through hole when the gates are 18. A gate valve shell having a through flow hole and a ate chamber with surfaces hole, and opposed gates working insai'd chamber and provided with packing to close together entirely around said ole and to expand against said surfaces and seal against leak thereby to said hole; the closing faces of said gates being covered by said packing.

19. A gate valve shell having a through shaft said valve structure presenting an un- 76 flow hole and a gate chamber with surfaces surrounding said hole, and opposed gates working in said chamber and provided with packin to close together entirel around said ho e and to expand against sai surfaces and seal against leak thereby to said hole; the closing faces of said gates beingcovered by said packing and having recesses to receive a t rough object in the valve hole.

20. A gate valve shell havinga through flow hole and a gate valve chamber with surfaces surrounding said hole, andopposed gates working in s'ad chamber and provided with top and bottom laps of packing to close together entirely around said holeand to expand against said surfaces; the packing of each gate extending across its closing face to make a joint seal between the closed gates.

. In testimony whereof, I have set In hand.

' BERTEL M. J EN EN.

and opposed gates therein, concentric, coaxial screw members connected to respective gates,

"and means for efiepting concurrent, reverse axial motion of the screw members to shi the gates.

16. A gate valve structure including a set of opposed gates, and means operatively congates and including a rotative nectl-ng the member having concentric right pitch and 

